Windshield wiper



May 8, 1923.

1,454,650 l. J. NELSON VwINDsHIELD wIPER .Filed April 5, 1922 J7 .Z4 Z3Patented "2 lIvaN J. NELsoN, oF SAGINAW, MICHIGAN.

Wmnsmnrjn WEER.

application med april 5, 1922. serial Na. 549,796. v

To all whom 'it may comem:

Be it known that I, IVAN J. NELSON, a citizen of the United States,residing at Saginaw, in the county of Saginaw and State of Michigan,have 'invented certain new and useful Improvements in Windshield Wipers;and I do hereby declare the folldw'ing to be a full, clear, and exactdescription of the invention, such as will enable others skilledin theart towhich it appertains to make and use the same. f

This invention relates to `wind shield cleaners for motor vehicles andthe like and pertains more particularly to that class of wind shieldcleaners in which a vertical wiper blade is made to travel across theWind shield from side to side, wiping the surface of the glass at eachpassage.

My invention pertains more particularly to certainimprovements in theconstruction and mode of operation of a -wind shield wiper of the classdescribed, whereby the objects or my invention are attained.

These objects are, iirstftov rovide a wind he shield cleaner in whichthe wiper blade during its travel is yieldingly pressed against thesurface of the glass, the esired pressure being obtained by a roller orequivalent device co-acting with the top rail otthe wind shield sash andlocated on the same side of the glass as the wiper.

A still further object is to provide in combination with the top railand side rails of the wind shield sash a driving mechanism carried by7the sash, but soA arranged with res ect to the sash as to permit thesash to be ti ted without interfering with the stationary frame in whichthe tiltin sash'ismounted.

With the foregoing an certain other ob# jects in view which will appearlater in the specification, my invention comprises thedevices describedand claimed and the equivalents thereof. Y

In the drawings, Ilig. 1 isa front view, broken away in part. showing atiltable wind shield with my improvement-attached.

Fig. 2 is a vertical section on the lin 2 2 of Fig. 1.

Fig. 3 is a to plan view of the working parts shown in i* ig. l, thesash and frame removed. y

Fig. is a perspective view of the travel ing pin that engages the screwshaft by which the wiper is propelled.

As is clearly shown in the drawings, 1 indicates the usual glass pane eta wind shield. 2 indicates a vertical side rail of the sash and' 3 thetop rail. 4 shows the frame of the machine upon which the tiltable sashis mounted. Upon the top rail S'andoutside the vision of the gla 1 ismounted a screw shaft 5, preferably formed with a I right-hand and aleft-hand thread.V

The screw shaft is mounted in suitable /bem'ings as 6 and 7, secured tothe rail 3, v

and the screw is driven by 4a gear 8 or its equivalent on the end oftheshaft. In mesh with the gear 8 is a-pinion 9,v which may be integralwith a worm Wheel 10 meshing with agworm 11 on the shaft of a suitablemotor l Referring to Fig; 2, it will be seen that the top rail 3 of thesash is formed with a A longitudinal groove 13 along one side and thatthe screw 5 lies within this groove andy practically Hush with the faceof the rail 3. Qn the shaft 5 is a traveling nut 14, within which is apin 15, shown in perspective in ig. 4, the lower reduced end of this pinengaging and traveling in the thread of the screw 5, so that while thescrew is revolving continuously in oneA direction the nut 14 will travelfrom en d to end of the screw, automatically reversing its movement ateach extremity of its travel. For purposes of illustrationl have shownthe screw thread as extending only part of the length of the upper outerface of t e top rail 3, and while so traveling presses the wiper blade18 snugly against the glass l, as shown in Fig. 2.

Since wind shields of the class described are usually tiltable withrespect to the frame 4 of the dash, I prefer to so construct the cornerof the wind shield upon which the shaft-driving mechanism is 'mountedthat the` gears or other devices comprising the'4 driving mechanism willbe compactly housed without interfering either with the vision or withthe tilting'of the'wind shield sash.

A preferred form of my wiper driving arrangement is shown in Fig. .1,where 19 is an oset in the rail 2 of the wind shield sash, permittingthe gears 8, 9 and 10 `te be mounted upon the end of the top rail 3-Without projecting laterally beyond the edge of the upright rail 2, andconsequently without interfering with the frame 4 when the sash istilted.

By means of the above described invention I have produced a simple,compact and strong, yet relatively inexpensive Wind ,shield Wiper, theparts of which areso 1ocatedas to be inwnspicuous. f

The arrangement of my improved Wiper is such that the roller 17 may bemounted upon the same side of the Wind shield as the Wiper 18, so thatno part of the wiping mechanism need be extended from the rear sidearound to the front or Weather side of the Wind shield glass.

While I have shown and described a drive including a direct connectedmotor, the motor beingY mounted on the top rail of the sash, yet it willbe obvious that any other form of drive, as a flexible shaft or a chain,might be substituted for the direct connected motor drive, Withoutdeparting from the spirit of my invention as set forth in the claims.

Having thus described my invention, what Mea-,eee

I claim and desire to secure by Letters Patent is:

`1. In combination, a Wind shield sash having a longitudinal groove inone rail thereof, a revolvable screw shaft Within said groove, a cornerof said sash being formed with an offset providing a recess, gearsoonnected to said shaft and located in said recess, a traveling nut onsaid revolvable screwr shaft, a spring-pressed Wiper vcarried by saidnut, a roller carried by said nut opposite said Wiper, said rollertraveling upon the outer face of the 'rail of said sash for the purposesset forth.

2. In combination, a wind sb ield sash h'aving a longitudinal groove inone rail thereof, a revolvable screw shaft, a traveling nut on saidshaft, a spring-pressed Wiper carried by said nut, a roller carried bysaid nut and located on the side of said nut opposite said Wiper, saidroller traveling upon the outer face of said sash'.

Intestimony whereof, I aix my signature.

ivan J. Neilson.

